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Hygromorphic actuator from a metal oxide film driven by a nano-capillary forest structure

We have developed a hygromorphic metal oxide actuator using an electrochemical method to produce a superhydrophilic free-standing nano-capillary forest of titanium oxide with a high aspect ratio (~80). This me...

Hosung Kang, Minki Lee, Hyuneui Lim, Howard A Stone, **kee Lee in NPG Asia Materials (2017)